In last 3 weeks ,It failure on ALT_HOLD , But Now success :

I find the reason failure : Important : The APM 3.1.2 IN3 (RC CH6)

must near 1520uS ,so that it can ALT_HOLD success .

I had adjusted the length of the Heli link rod , Angle +7 of main rotor

when RC CH6 at 1520uS (IN3) ... 500 Heli ALT_HOLD success !!

ThankS development group give us V3.1.2 software .

3691105035?profile=original

V3.12_500_0222_50Hz.param

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  • Developer

    Congrats.  I'm surprised ch6 matters.  That's input channel 6?  So you're tuning something?

    • I'm guessing he's using a heli profile in the radio, and using a collective pitch curve.  Ch6 is probably the "collective" channel, which I assume he has routed into Ch3 Input.  This is all covered in the wiki already (you shouldn't do this).  

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